Pipe-coupling.



No. 694,072; Patented "m. 25, I902.

W. M. PEARCE.

PIPE COUPLING.

(Application filed N01. 7; 1901.)

(lo Model.)

1? a wuentoz QWi Hwooeo J MP6W'06 E v A W E WW UNITED STATES PATENT OFFICE.

IVILLIAM MILBURN PEARCE, OF NORlVOOD, WEST VIRGINIA.

PIPE-COUPLING.

SPECIFICATION forming part of Letters Patent No. 694,072, dated February 25, 1902.

I Application filed November '7, 1901. Serial No. 81,417. (No model.)

To all LU/Z0777, it may concern.-

Be it known that I, WILLIAM MILBURN PEARCE, a citizen of the United States of America, residing at Norwood, in the county of McDowell and State of West Virginia, have invented certain new and useful Improvemen ts in Pipe-Couplings, of which the following is a specification, reference being had to the accompanying drawings, in which Figure 1 is a plan view of the coupling, the pipe being in section; Fig. 2, aside elevation thereof, and Fig. 3 a vertical section on the line 3 3 of Fig; 1.

The object of this invention is to provide a simple and inexpensive and practical coupling device for metallic piping; and it con sists of certain novel features hereinafterset forth and claimed.

These pins may be secured rigidly in place in any suitable manner, but preferably in the manner shown, which consists in casting an angular enlargement on the outer face of the flange and drilling a hole down through the same and into the pin for the reception of a lock-pin b. The flanges are drawn together by a bolt 0, which passes through both flanges and is provided with a nut 01 at one end. This bolt is set at an angle corresponding to the pins or and is inclined in the same direction, and to afford squarebearings for the head of the bolt and the nut angular enlargements e are formed on the outer faces of the respective flanges.

To connect up the cou-pling,it is simply necessary to insert the ends of the bolt and the pins into their respective openings or sockets and then draw the bolt, and to disconnect the coupling it is simply necessary to remove nut d. The pins a and the bolt are put in place there is but one bolt.

before the flange is screwed to the pipe, after which they are not removedexoept for renewal or repair. It will be observed that the bolt is inreality but one of thepins extended and threaded for the reception of the nut. Any number of pins may be employed; but I prefer to employ four pins and one bolt on couplings of the ordinary size and to dispose them around the flange at equal distances apart.

My coupling will-cost no more to manufacture than the couplings of the ordinary make and will save a large proportion of the time usually consumed in coupling up and uncoupling the ordinary flange-and-bolt coupling, as in such couplings there are from four to six bolts to manipulate, whereas in mine Furthermore, the bolt may be readily positioned so that it may be conveniently gotten at with a wrench, while with the ordinary coupling in use the line of piping must be moved away from the supportin g-wall before access can be had conveniently .to the nuts.

This device is especially advantageous for use in connection with pipework in mines and shafts where water accumulates rapidly and the pumps cannot be'stopped for any length of time without considerable loss. It will be observed also that where the piping is set so that the strain is-in the direction of the bolt and pins the tendency will be to hold the parts of the coupling together. This is quite an important item, especially where the piping is used 011 slopes and in shafts where it has to bedisconneoted frequently for the purpose of blasting.

Having thus fully described my invention, What I claim, and desire to obtain by Letters Patent, isi 1. In a coupling, the combination of the pipes provided with flanges, one of said flanges being provided with one or more pins extending obliquely from one of its faces and entering similarly-inclined holes in the other flange, and means for drawing the two flanges together.

2. In combination, two pipe-sections each of which is provided with a flange,one flange signaturejn the presence oftwo witnesses,this 31st day of October, 1901.

\VILLIAM MILBURN PEARCE.

Witnesses:

B. F. WILLIAMS, G. P. BEAVERS. 

